<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>03_Bootstrap-响应式容器</title>
  <link rel="stylesheet" href="./libs/bootstrap-4.6.1/css/bootstrap.css">
  <style>
    div {
      background-color: pink;
      height: 50px;
    }
  </style>
</head>
<body>
  
  <h3>container</h3>
  <div class="container">container</div>
  
  <h3>container-fluid</h3>
  <div class="container-fluid">container-fluid</div>

  <h3>container-lg</h3>
  <div class="container-lg">container-lg</div>
  
</body>
</html>